Patents by Inventor Takahiro Saito

Takahiro Saito has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190257277
    Abstract: A fuel injection valve includes: a valve seat member to which the valve seat is formed; a welding portion between the valve seat member and the cylindrical member, which is provided on the base end side of the stepped surface, the valve seat member being assembled to be press-fit in the cylindrical member so that a tip end side abutment pressure between an inner circumference surface of the cylindrical member, and a tip end side outer circumference surface portion of the valve seat member which is on the tip end side of the stepped surface is smaller than a base end side abutment pressure between the inner circumference surface of the cylindrical member, and a base end side outer circumference surface portion of the valve seat member which is on the base end side of the stepped surface portion.
    Type: Application
    Filed: August 9, 2017
    Publication date: August 22, 2019
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Takahiro SAITO, Ryuta KINOSHITA, Nobuaki KOBAYASHI
  • Publication number: 20190233290
    Abstract: Provided is a method for producing a porous carbon material, containing a step of subjecting a mixture containing inorganic carbide particles and inorganic oxide particles to a heat treatment under a chlorine gas atmosphere.
    Type: Application
    Filed: April 12, 2018
    Publication date: August 1, 2019
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Shinji Ishikawa, Takahiro Saito
  • Publication number: 20190228286
    Abstract: A non-transitory computer-readable recording medium stores a learning program that causes a computer to execute a process including: extracting, from a plurality of data groups, a plurality of first data groups having an order; generating, for each data element corresponding to each of the first data groups, an ordered data matrix in which data elements having same order have value corresponding to relationship among the data elements and data elements having different orders have values corresponding to the different orders; and obtaining input tensor data by performing tensor decomposition with the ordered data matrix, inputting the input tensor data to a neural network at time of performing deep machine learning, performing deep machine learning of the neural network, and learning about method for the tensor decomposition.
    Type: Application
    Filed: January 18, 2019
    Publication date: July 25, 2019
    Applicant: FUJITSU LIMITED
    Inventor: Takahiro Saito
  • Publication number: 20190228304
    Abstract: A non-transitory computer-readable recording medium stores a learning program that causes a computer to execute a machine learning process for graph data. The machine learning process includes: generating, from graph data to be subjected to learning, extended graph data where at least some of nodes included in the graph data have a value of the nodes and a value corresponding to presence or absence of an indefinite element at the nodes; and obtaining input tensor data by performing tensor decomposition of the generated extended graph data, performing deep learning with a neural network by inputting the input tensor data into the neural network upon deep learning, and learning a method of the tensor decomposition.
    Type: Application
    Filed: January 18, 2019
    Publication date: July 25, 2019
    Applicant: FUJITSU LIMITED
    Inventor: Takahiro Saito
  • Publication number: 20190228302
    Abstract: A non-transitory computer-readable recording medium stores therein a learning program that causes a computer to execute a process including: generating, from graph data subject to learning, extended graph data that has a value of each node included in the graph data, and a value corresponding to a distance between each node and another node included in the graph data; and obtaining input tensor data by performing tensor decomposition of the generated extended graph data, performing deep learning with a neural network by inputting the input tensor data into the neural network upon deep learning, and learning a method of the tensor decomposition.
    Type: Application
    Filed: January 14, 2019
    Publication date: July 25, 2019
    Applicant: FUJITSU LIMITED
    Inventor: Takahiro Saito
  • Patent number: 10344726
    Abstract: The purpose of the present invention is to provide a fuel injection valve that can achieve sufficient atomization even if the spray angle is narrow.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: July 9, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Kazuki Yoshimura, Mitsuhiro Matsuzawa, Eiji Ishii, Akihiro Yamazaki, Takahiro Saito, Nobuaki Kobayashi
  • Publication number: 20190195182
    Abstract: A fuel injection valve includes a valve seat 15b and a valve body 27c that cooperate with each other to open and close a fuel passage, a movable element 27 that has the valve body 27c provided at one end thereof and has a fuel passage formed therein, a valve seat member 15 having the valve seat 15b formed thereon, an upstream-side communication hole 27boa that is located upstream of the flow of fuel and connects the inside and outside of the movable element 27, and a downstream-side communication hole 27bob that is located downstream of the flow of fuel and connects the inside and outside of the movable element, in which a guide section for the valve body 27c, where the valve seat member 15 and the valve body 27c are in sliding contact with each other, is provided downstream of the downstream-side communication hole 27bob and in which a fuel passage 17h for connecting in the center axis direction the upstream side and downstream side of the guide section is provided at the same angular position in the circumf
    Type: Application
    Filed: March 5, 2019
    Publication date: June 27, 2019
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takahiro SAITO, Nobuaki KOBAYASHI, Eiji TAMURA
  • Publication number: 20190170102
    Abstract: An object of the invention is to achieve sufficient atomization, while preventing a spray from spreading. A fuel injection valve includes a plurality of swirl fuel injection passages. Each of the swirl fuel injection passages includes a swirl chamber, a swirl chamber introduction passage, and an orifice and imparts a swirling force to fuel to thereby inject the fuel outside. A rectangular coordinate system is imagined on an imaginary plane. The rectangular coordinate system has a center of an inlet opening surface of the orifice as an origin and has an X-axis extending in parallel with a centerline of the swirl chamber introduction passage and being positive in a direction from an upstream side toward a downstream side of the swirl chamber introduction passage and a Y-axis extending perpendicularly to the X-axis and being positive in a direction away from the centerline.
    Type: Application
    Filed: January 20, 2017
    Publication date: June 6, 2019
    Inventors: Mitsuhiro MATSUZAWA, Kazuki YOSHIMURA, Eiji ISHll, Akihiro YAMAZAKI, Takahiro SAITO, Nobuaki KOBAYASHI
  • Publication number: 20190115175
    Abstract: A relay device wherein power can be supplied to a load from at least two power storage units and can detect when an abnormality such as an open-circuit failure occurs in a path of one of the power storage units, accurately. A control unit in a relay device functions as a switching control unit, if the current value becomes lower than a current threshold value in a first conduction path and a second conduction path, the control device switches a relay unit to an OFF state. Furthermore, the control unit functions as a determination unit and determines whether, if it switches one of the relay units to the OFF state, a voltage value detected by a voltage detection unit provided in the path in which the relay unit that was switched to the OFF state is lower than a predetermined voltage threshold value.
    Type: Application
    Filed: June 16, 2017
    Publication date: April 18, 2019
    Inventor: Takahiro Saito
  • Publication number: 20190101087
    Abstract: In the present invention, two side-section side surfaces and each horizontal passage run along a fuel flow direction and have a linear section, and an end-section side surface formed between the two side-section side surfaces and forming an upstream-side end portion has a curved section connected to the side-section side surfaces and. When a fuel inlet and the horizontal passages are projected onto a plane perpendicular to a valve axial center, a projected line of the linear section of each of the horizontal passages extends to a place intersecting a projected line of the opening edge of the fuel inlet, and the upstream-side end portion of each of the horizontal passages extends toward the inside of the opening edge.
    Type: Application
    Filed: February 16, 2017
    Publication date: April 4, 2019
    Inventors: Takahiro SAITO, Nobuaki KOBAYASHI, Akihiro YAMAZAKI, Eiji TAMURA
  • Patent number: 10247158
    Abstract: A fuel injection valve includes a valve seat 15b and a valve body 27c that cooperate with each other to open and close a fuel passage, a movable element 27 that has the valve body 27c provided at one end thereof and has a fuel passage formed therein, a valve seat member 15 having the valve seat 15b formed thereon, an upstream-side communication hole 27boa that is located upstream of the flow of fuel and connects the inside and outside of the movable element 27, and a downstream-side communication hole 27bob that is located downstream of the flow of fuel and connects the inside and outside of the movable element, in which a guide section for the valve body 27c, where the valve seat member 15 and the valve body 27c are in sliding contact with each other, is provided downstream of the downstream-side communication hole 27bob and in which a fuel passage 17h for connecting in the center axis direction the upstream side and downstream side of the guide section is provided at the same angular position in the circumf
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: April 2, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takahiro Saito, Nobuaki Kobayashi, Eiji Tamura
  • Publication number: 20190097453
    Abstract: The present invention realizes a relay device that can prevent malfunction due to occurrence of reverse flow of current in any of paths. A control unit that is provided in a relay device functions as a switching control unit, keeps an ON state of a first relay unit and a second relay unit if both of currents flowing through a first conduction path and a second conduction path flow in a normal direction (direction toward a load, and if the current flows in the reverse direction in one of the paths, switches one relay unit that is provided in a reverse flow path in which the current flows in a reverse direction to an OFF state.
    Type: Application
    Filed: June 12, 2017
    Publication date: March 28, 2019
    Inventor: Takahiro Saito
  • Patent number: 10233884
    Abstract: The present invention includes a bobbin having a winding part around which a coil winding is wound, a terminal extending from the bobbin in the axial direction of the bobbin, and a wrapping part which is provided to the terminal and in which a terminal lead wire pulled out from a coil part that is wound around the winding part is wrapped and fused. The terminal lead wire wired between the bobbin and the wrapping part in a state of being in contact with the surface of the terminal. The peripheries of the bobbin, the wiring part of the terminal lead wire and the wrapping part are covered with resin.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: March 19, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Eiji Tamura, Nobuaki Kobayashi, Takahiro Saito, Akihiro Yamazaki
  • Publication number: 20190078543
    Abstract: Electromagnetic solenoid has movable core having end surface that is formed between inner circumferential surface and outer circumferential surface of movable core; and fixed core having end surface that is formed between inner circumferential surface and outer circumferential surface of fixed core and faces the end surface of movable core. Ring-shaped protruding portion is formed at least either one of the end surface of the movable core or the end surface of the fixed core. Protruding portion is provided at a position that is shifted to a radially inner circumferential side of the end surface. A length between apex and inner circumferential edge of protruding portion is shorter than a length between the apex and an outer circumferential edge of protruding portion.
    Type: Application
    Filed: February 16, 2017
    Publication date: March 14, 2019
    Inventors: Akihiro YAMAZAKI, Takahiro SAITO, Nobuaki KOBAYASHI, Akiyasu MIYAMOTO, Yoshihito YASUKAWA
  • Patent number: 10192449
    Abstract: A non-transitory computer-readable recording medium stores a collision risk calculation program that causes a computer to execute a process including: acquiring traveling information on a position and a speed of each of a first ship and a second ship; calculating a future traveling direction range of one or both of the first ship and the second ship based on a position of each of the first ship and the second ship and traveling information of a ship that sailed in a past; and calculating a risk of collision between the first ship and the second ship based on the future traveling direction range.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: January 29, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Hiroko Suzuki, Takahiro Saito
  • Publication number: 20180374657
    Abstract: A porous carbon material for an electric double-layer capacitor electrode, in which the porous carbon material is formed from secondary particles having a particle size of from 3 ?m to 100 ?m, the secondary particles are formed from primary particles having a particle size of from 0.1 ?m to 0.5 ?m, and the porous carbon material has an internal specific surface area of 900 m2/g or greater.
    Type: Application
    Filed: June 2, 2017
    Publication date: December 27, 2018
    Inventors: Shinji Ishikawa, Takahiro Saito
  • Publication number: 20180363612
    Abstract: There is provided a solenoid pipe including a pipe formed of a ferromagnetic material containing 15 mass % or more to 18 mass % or less of Cr, an electromagnetic coil, and a valve body. A part of the pipe includes a reform portion, and the reform portion has a composition in which a component of the ferromagnetic material is mixed with a component of a Ni-containing material. e/d which is a ratio of a maximum deformation amount e of an outer circumferential surface side of the reform portion of the pipe with respect to a thickness d of the pipe near the reform portion is 0.5 or less, and c/d which is a ratio of a maximum deformation amount c of an inner circumferential surface side of the reform portion of the pipe with respect to the thickness d of the pipe is 0.5 or less. Accordingly, it is possible to obtain a locally feeble magnetized pipe with high dimensional accuracy and the solenoid valve using the pipe.
    Type: Application
    Filed: December 24, 2015
    Publication date: December 20, 2018
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Shinya OKAMOTO, Xudong ZHANG, Nobuaki KOBAYASHI, Takahiro SAITO, Akihiro YAMAZAKI
  • Patent number: 10145688
    Abstract: A non-transitory computer-readable recording medium stores therein a program that causes a computer to execute a process. The process includes calculating, for each of a plurality of grids through which a track of a specific vessel passes, an angle of approach and an angle of exit of the track, respectively; extracting a grid for which the angle of approach and the angle of exit conform to a determining condition set for each of the grids based on the determining condition; and determining whether the specific vessel has taken an avoidance behavior based on a relative distance from another vessel corresponding to a position of the specific vessel in a track in the extracted grid.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: December 4, 2018
    Assignee: FUJITSU LIMITED
    Inventor: Takahiro Saito
  • Publication number: 20180306155
    Abstract: It is an object of the present invention to provide a fuel injection valve that can increase the collision force of the fuel with respect to the injection hole inner wall surface and which can realize a sufficient atomization. In an imaginary plane orthogonal to a center axis line direction of a valve body, a plurality of injection holes through and through constituting a first injection hole set are formed such that an injection hole center axis extending from an injection hole inlet surface toward an injection hole outlet surface is formed to extend in a direction different from that of a straight line connecting the origin of an imaginary orthogonal coordinate system formed by an imaginary X-axis and an imaginary Y-axis and the center of an injection hole inlet surface and that the center of an injection hole outlet surface is situated close to the imaginary X-axis with respect to the center of the injection hole inlet surface.
    Type: Application
    Filed: September 21, 2016
    Publication date: October 25, 2018
    Inventors: Mitsuhiro MATSUZAWA, Kazuki YOSHIMURA, Eiji ISHII, Akihiro YAMAZAKI, Takahiro SAITO, Nobuaki KOBAYASHI
  • Patent number: 10090934
    Abstract: An optical receiver module that receives a wavelength-multiplexed optical signal is disclosed. The optical receiver module includes a first lens, an optical de-multiplexer, second lenses, and photodiodes. The first lens forms a beam waist of the wavelength-multiplexed optical signal output therefrom. The optical de-multiplexer de-multiplexes the wavelength-multiplexed optical signal into optical signals depending on wavelengths thereof and is installed so as to make optical paths for respective optical signals different from each other. The second lenses concentrate the optical signals onto the respective photodiodes. In the optical receiver module, the beam waist of the wavelength-multiplexed optical signal is set in a halfway between a longest path and a shortest path from the first lens to the second lenses.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: October 2, 2018
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hiroshi Hara, Masanobu Kawamura, Takahiro Saito